Granted Patent
Utility
US 5,895,570 · App. 08/599,259
Modular filtering system
Inventor:
Li-Shiang Liang
Patented Case
View Patent ↗
Granted: Apr 20, 1999
Filed: Feb 9, 1996
Inventor
Li-Shiang Liang
Assignee (at issue)
United States Filter Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.